diff --git a/document/linux/config/bash/module/name.sh b/document/linux/config/bash/module/name.sh
index 46d25a2..e1e61a2 100644
--- a/document/linux/config/bash/module/name.sh
+++ b/document/linux/config/bash/module/name.sh
@@ -14,28 +14,13 @@ name()
 
   # process.
   for file in $files; do
-    local extension
     local new_name
 
     # extract new name.
-    extension="${file##*.}";
-
-    if [ -f "$file" ] && [ "$extension" != "$file" ]; then
-      new_name="${file%$extension}"
-    else
-      new_name="$file"
-      extension=""
-    fi
-
-    new_name=$(echo "$new_name" | \
-      sed -e 's/^0\+//g' \
-          -e 's/[ ,-]\+/_/g' \
-          -e 's/[][?,:,\!,@,~,&,=,%,+,#,\,,(,),{,}]\+//g' \
-          -e s/\'//g \
-          -e 's/_\+/_/g' \
-          # -e 's/\.\+/_/g' \
-      )
-    new_name="${new_name,,}$extension"
+    new_name=$(echo "$file" | \
+      sed -e "s/[^[:alnum:]\.-]/_/g" \
+          -e "s/_\+/_/g"
+    )
 
     # status line.
     local status="[$count/$total] $file -> $new_name"